experimental/ndkSampleGen/build.gradle

// BEGIN_EXCLUDE
import com.example.android.samples.build.SampleGenPlugin
apply plugin: SampleGenPlugin

samplegen {
  pathToBuild "../../../../build"
  pathToSamplesCommon "../../common"
}

task emitBrowseableAll {
    println "Executing all tasks"
}

task emitGradleAll {
    println "Executing all tasks"
}

task emitGradleZipAll {
    println "Executing all tasks"
}

def tasksBrowseable = []
def tasksGradle = []
def tasksGradleZip = []
def samplesXml = (new XmlParser()).parse('samples.xml')
samplesXml.sample.each { sample ->
  println "Creating task : " +  sample.@name

  //
  //Browseable task
  //
  task "task${sample.@name}Browseable" (type:Copy) {
    def outputPath =outPath("browseable", sample.@name);
    //Get absolute path of input path
    FileTree inputFileTree = project.fileTree(sample.@path)
    def inputPath = inputFileTree.getFiles().iterator().next().parentFile.absolutePath //sample.@path

    println  "Input path : " + inputPath

    mkdir outputPath
    into outputPath

    from("${inputPath}/AndroidManifest.xml")
    from("${inputPath}/lint.xml")
    from("${inputPath}/project.properties")
    into("res") {
      from("${inputPath}/res")
    }
    into("assets") {
      from("${inputPath}/assets")
    }

    //Collect C++ files
    into("jni") {
      from("${inputPath}/jni")
    }

    //Collect java files
    def javaDirs = ["${inputPath}/src"]
    FileTree javaTree = null;
    javaDirs.each { dir ->
      FileTree tree = project.fileTree("${dir}")
      javaTree = (javaTree == null) ? tree : javaTree.plus(tree)
    }

    println javaTree;
    println javaDirs
    Map collapsedPaths = collapsePaths(javaTree, javaDirs)
    println collapsedPaths

    javaDirs.each { srcPath ->
      println srcPath
      into("src") {
        def javaPath = "${srcPath}"
        from(javaPath)
        setIncludeEmptyDirs(false)
        include(["**/*.java", "**/*.xml"])
        eachFile { FileCopyDetails fcd ->
          if (fcd.file.isFile()) {
            def filename = fcd.name;
            String collapsed = collapsedPaths.get(fcd.file.path);
            fcd.path = "src/${collapsed}";
          } else {fcd.exclude()}
        }
        println "***************** done"
      }
    }
  }

  //
  //Zipfile task
  //
  task "task${sample.@name}Gradle"(type:Copy) {
    //dependsOn(preflight)

    def outputPath =outPath("gradle", sample.@name);
    def inputPath = sample.@path
    // Copy entire sample into output -- since it's already in Gradle format, we'll explicitly exclude content that
    // doesn't belong here.
    mkdir outputPath
    into outputPath
    from("${inputPath}") {
        // Paths to exclude from output
        exclude ".classpath"
        exclude ".cproject"
        exclude ".project"
        exclude ".settings"
        exclude "bin"
        exclude "gen"
        exclude "obj"
        exclude "libs"
        exclude "**/proguard-project.txt"
        exclude "${samplegen.targetSampleModule()}/**/README*.txt"
    }

    // Remove BEGIN_EXCLUDE/END_EXCLUDE blocks from source files
    eachFile { file ->
        if (file.name.endsWith(".gradle") || file.name.endsWith(".java")) {
            // TODO(trevorjohns): Outputs a blank newline for each filtered line. Replace with java.io.FilterReader impl.
            boolean outputLines = true;
            def removeExcludeBlocksFilter = { line ->
                if (line ==~ /\/\/ BEGIN_EXCLUDE/) {
                    outputLines = false;
                } else if (line ==~ /\/\/ END_EXCLUDE/) {
                    outputLines = true;
                } else if (outputLines) {
                    return line;
                }
                return ""
            }
            filter(removeExcludeBlocksFilter)
        }
    }
  }

  task "task${sample.@name}GradleZip"(type:Zip) {
    def outputPath =outPath("browseable", "");
    def folderName = "${sample.@name}"
    archiveName = "${sample.@name}.zip"
    def inputPath = outPath("gradle", sample.@name)
    from inputPath
    into folderName
    include "**"
    def outDir = project.file(outputPath)
    destinationDir = outDir
  }

  //Add tasks to list
  tasksBrowseable.add("task${sample.@name}Browseable")
  tasksGradle.add("task${sample.@name}Gradle")
  tasksGradleZip.add("task${sample.@name}GradleZip")
}

//Add generated tasks to dependency list
emitBrowseableAll.dependsOn(tasksBrowseable)
emitGradleAll.dependsOn(tasksGradle)
emitGradleZipAll.dependsOn([tasksGradle, tasksGradleZip])

String outPath(String buildType, String sampleName) {
/*
    def repoInfo = "repo info platform/developers/build".execute().text
    def buildPath = (repoInfo =~ /Mount path: (.*)/)[0][1]
*/
    return "${samplegen.pathToBuild}/out/${buildType}/${sampleName}";
}

/**
 * Collapse a path "IntelliJ-style" by putting dots rather than slashes between
 * path components that have only one child. So the two paths
 *
 * com/example/android/foo/bar.java
 * com/example/android/bar/foo.java
 *
 * Become
 * com.example.android/foo/bar.java
 * com.example.android/bar/foo.java
 *
 * @param path
 * @param roots
 * @return
 */
Map<String,String> collapsePaths(FileTree path, List<String> roots) {
    Map result = new HashMap<String,String>();

    println ("******************** Collapse *************************")

    path.visit { FileVisitDetails f ->
        if (f.isDirectory()) return;
        StringBuilder collapsedPath = new StringBuilder("${f.name}");
        File current = f.file;

        //
        // Starting at this file, walk back to the root of the path and
        // substitute dots for any directory that has only one child.
        //

        // Don't substitute a dot for the separator between the end of the
        // path and the filename, even if there's only one file in the directory.
        if (!f.isDirectory()) {
            current = current.parentFile;
            collapsedPath.insert(0, "${current.name}/")
        }

        // For everything else, use a dot if there's only one child and
        // a slash otherwise. Filter out the root paths, too--we only want
        // the relative path. But wait, Groovy/Gradle is capricious and
        // won't return the proper value from a call to roots.contains(String)!
        // I'm using roots.sum here instead of tracking down why a list of
        // strings can't return true from contains() when given a string that
        // it quite obviously does contain.
        current = current.parentFile;
        while((current != null)
                && (roots.sum {String r-> return r.equals(current.absolutePath) ? 1 : 0 } == 0)) {

          //Exclude files starting with "."
          def files = 0
          current.list().each { file ->
            if (!file.startsWith("."))
              files++
          }
          char separator = files > 1 ? '/' : '.';
          collapsedPath.insert(0, "${current.name}${separator}");
          current = current.parentFile;
        }
        result.put(f.file.path, collapsedPath.toString());
    }

    println ("******************** Results *************************")

    result.each {entry -> println("${entry}\n\n");}
    return result
}


//apply from: "ndkbuild.gradle"
// END_EXCLUDE